#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>

int compare(const void *a, const void *b)
{
    return *((const uint32_t*)a) > *((const uint32_t*)b);
}

const int N = 1000001;
uint32_t x = 0, y = 1, z = 2, w = 3;
uint32_t t = 0;
uint32_t generate() { 
    t = (x^(x<<11));
    x = y;
    y = z;
    z = w;
    w = (w ^ (w >> 19)) ^ (t ^ (t >> 8)); 
    return w;
}
int32_t seed;
uint32_t a[1000001];
int main(void) {
    scanf("%d", &x);

    for (int i = 0; i < N; i++)
        a[i] = generate();
    qsort(a, N, sizeof(uint32_t), compare);
    printf("%lld\n", (long long)a[N/2]);

    return 0;
}